Hoisting mechanism.



H. B. NEWHALL, JR.

HOISTING MECHANISM.

APPLICATION FILED JUNE 12. 191?.

1,288,137. Patented Dec. 17. 1918.

2 SHEETS-SHEET I.

a nve'hto'c H. B. NEWHALL, JR.

HOISTING MECHANISM.

APPLICATION FILED JUNE I2, 1911.

Patented Dec. 17, 1918.

tinrrnn srarns Arm nnro HENRY B. NEWHALL, JR., 0F PLAINFIELD, NEW JERSEY.

norsrrne MECHANISM.

ing is a specification, taken in connection with the accompanying drawings.

My invention relates to hoisting mechanism, and more particularly to an auxiliary hoisting mechanism to be used in connection with a flexible driving member of a more powerful hoisting mechanism. I

More specifically, it relates to. an auxiliary device to operate the ordinary chain member of a standard chain hoist. Of course, it-is to be understood that while I have shown the flexible member in the form of a chain, any other suitable form of flexible member may be used. r

I have shown in the accompanying drawings, different illustrative embodiments of my invention, but of course it is to be understood that my invention is not to be confined simply to the forms illustrated, except as required by the scope 1 of the accompanying claims. In these drawings the same reference numerals refer to similar parts.

Figure l is a side elevation of the'ordinary form of standard chain hoist, showing my auxiliary hoisting mechanism cooperating with a hand chain;

Fig. 2 is a side elevation, similar to Fig. 1, except that my auxiliary power member is shown operating the flexible member, or

chain, in the reverse direction than that shown in Fig. 1; V

Fi 3 is aside elevation of m auxiliary power member, equipped to cooperate with a flexible member in the form of a hand chain;

Fig. 4 is a vertical section substantially on the line H of Fig. 5, looking in the direction of the arrows;

Fig. 5 is a plan view of my auxiliary hoisting mechanism. the hand chain being shown in horizontal section, and a portion of the sprocket wheel being broken away for the purpose of clearer illustration. I

Large hand power cranes are now in common use in locations where they are not used often enough to warrant the additional expense of installing electric cranes 0f the Specification of Letters Patent.

Application filed J une 12, 1917.

Patented Dec. 17, rate. Serial No. 174,217. I

same capacity. For example, in factories, power houses, sugar mills and where it is necessary to replace armatures, dismantle dynamos or turbines, or handle the rolls of a sugar mill, or other heavy part of the operatmg equipment. These cranes often run as high as fifty tons capacity. They are equipped with the ordinary chain blocks which are operated by a flexible member or hand chain. To operate these heavy cranes oftentakes a great deal of time, oftenhours, to hoist an armature, or other similar heavy portion of the equipment, only a few feet, so that the necessary work in connection with, or upon, it may be accomplished. This is on account of the multitude of gear and chain reductions necessary to hoist heavy loads by hand power.

By my invention, with a very slight additional outlay, the ordinary heavy capacity hand crane can be speeded up so that it may be operated ten or fifteen times, or more, faster than it can be operated manually.

In locations where more than one such crane is used my auxiliary hoisting mechanism may be moved from one to another crane performing its work equally well. In cases, where it is not desired tooperate it for any reason, it can be readily disconnected and laid aside until such time as it may be desirable to use it again. a

In the particular embodiment of my invention. shown in the drawings, 1, Fig. 3, is my auxiliary power member, formed in the device shown by way of example, by the two side plates2 and 3, provided with downwardly ext-ending arms 4 and 5, respectively, which are permanently connected together by means of the cross plate 6. On the side plate 2. I secure, in any suitable manner as by the bolts 7, 7, thebearing plate 8, a similar bearing plate 9 being similarly secured upon the side plate 3. Mounted in these bearing plates 8 and 9 is the main axle 10 upon which is keyed the worm wheel 11 and also thechain pocket wheel 12, if my device is to be operated with a flexible member in the form of a hand chain 18. The ordinary hook 41 is mounted on the ordinary load chain 40. Y i

Permanently secured upon the cross Plate 6 is a driving member 14, which, in the form illustrated, is an electric motor, having a vertical shaft 15 upon which is carried a 

